Correct option is (B)

 Explanation for the correct option.

1.    copper-T is contraceptive used to avoid pregnancy.

2.    It is T-shaped wired instrument placed in the upper reproductive system in the female.

3.    It is placed above the cervix that covers the uterus and the gateway to the fallopian tube.

4.    Copper is used because it inhibits the zinc ions present in the uterus that used to facilitate the fertilizations.

5.  It increases phagocytosis of sperms within the uterus and suppress sperm motility and fertilizing capacity of sperms. 

6.    Copper -T causes the depression of ovum and sperm transport towards each other.